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`WILLIAM fr'. PORTER', oF wILMINeToN, DaLAwAIt-:t-`

` Lam Pate-at No. 79,080, ma June 23, 186e,

IMPROVEMENT IN DEVICE PoR sToPPINe AND STARTING cAtENDrR-.Rotta tlge Stimmt referat tt in ttm tttttr tttut attuati@ gatti ttt stmt.

TO ALL WHOM IT MAY CONGERN:

Be it known that I, WILLIAM T. PORTER, ofWilmington, in the county of New Castle, and'State of Delaware, have invented anew and improved Device for Stopping and Starting Calender-Rolls; and I. do'hereby declarel that the following is a,full, clear, and exact description thereof, which will enable those skilled in the art to-xnake and use the same, reference' being had to the accompanying drawings, forming part of this specification, in whichi Figure 1 is a cross-section of the rolls through the line A B, iig. 2.

Figure 2 is a sectional plan of the same, one-quarter of the roll being removed by longitudinalplanes intersecting at its anis-line.

Similar letter-slof Vreference indicate corresponding parts.

The object of this inventionis to operate the friction-clutch of calender-rolls in paper-machines, by means of a rod, bar, or bolt, running through the axial centre-of the said roll.

In the accompanying plate of drawings, the roll is`shown at A, the same being cast hollow, by rncanspfl a core,fin the usual manner.

A bolt orrod, E, passes through the axis of the rol-l. One end ofthis rod is formed with a screw-thread, which works in a corresponding hollow screw, in the hub-block H, on which latter is keyed a hand-wheel, G;

The hub-block tits with finished contact within a cylindrical recess in the reduced end of the roll, as shown, Vso that the said block and hand-wheel will revolve with the roll.

The friction-clutch' C fits in contact with the friction-Harige B, in the 4usual manner, nothing `new being `claimed inthe construction ofthis part. V

The clutch-disk C is keyed ona shaft, D, which latter is the driving-shaft, or the shaft which communi-l cates motion to the roll, for the -reduced ends I rest in journals inV the frame of the machine, and the roll isA driven by the shaft D of the clutch.

. This is the common manner of driving the lower roll in paper-machines, and nothing new is claimed in its I construction, per se, but 'in order to obviate the necessity of going `to the rear of the, machine to throw thecluch in or outof gear with theroll, as was necessary with the clutch-devices"heretofore employed, I connect the bolt E, before described, withthe shaft D, by a swivelfjoint, and draw the clutch 'C in contact with the flange B,of the ,rol1,byl turning the hand-wheel G, for the said hand-wheel being keyed on the hub-block H, and the screw-thread of the boltE working in the said hub-block, the clutch-disk C will be brought in contact with the angeB, and the roll be made to turn.

The swivel-joint, by which the bolt and shaft are connected, consists of the head Zw, tting in a chamber or recess, a, in lthe shaft D.

The head li forms part ofthe bolt E, and is entered in the, said recess from the side of the shaft, the longitudinal slot D1, in the shaft, permitting the lateral entrance of the bolt, asshown.

The slot DIand recess a 'communicate with each other, and both open laterally outhe shaft.v

Other -devices may be substituted for the screw-thread and hub-block, as shown, as a key, a cam, or a helical surface. I i

Thelswivel-joint is for the purpose of permitting therotating of the'shaft when the roll is stopped.

When the roll is to be stopped, the hand-wheel is seized and held, and the continued motion of the roll will throw oli the clutch from the flange B, when the |roll will cease to revolve. I A` An end plate, d, .holds the hub-block `within its recess, as shown.

V' lhe rod or bar, as shown, may be substituted by a tube or cylinder, with like result.

The parts of this-machine arefof metal. The axial connection ofthe clutch-disk with Aa hand-whechor its equivalent atthe oppositeend of the roll, renders lthe device simple and effective in throwing a calenderroll in and' out of gear. v p

Having thus described my invention, what I claim as new, an`d desire to secure byALett'ers Patent, is- The rod E, passing through the roll'A, and connected at one end tothe shaft D of the roller a-nd frictiondisk, by a swivel-joint, its other extremity fitting within the hub-block E, provided with the hand-wheel G, all constructed and arranged to perate substantially as and fo the purpose herein'set forth.

`WM. T. PORTER.

Witnesses: w

ALFRED D. Poot, J. Morrow Poor.. 

